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Last activity 2017-04-23 01:32:33 +0200 by Daniel Wang flag of Korea, Republic of

What will the range be with a ble 5 server, but iphone with Bluetooth 4

If I used a nrf52840 bluetooth5 as a server, but customers have iPhones with Bluetooth 4.x on, will the range still be 2x or 4x, as stated by BT SIG?

Did Nordic test the range with Bluetooth 4.x ... (more)

42
views
2
votes
1
answer
Last activity 2017-04-22 01:43:55 +0200 by edougal

Weird Problem where Segger RTT breaks if using more than 8kB of RAM

I started a new software project on the nRF52832 a couple of weeks ago. I've been using Segger RTT for a lot of debugging with no problem throughout the beginning of the process. I've recently hit an issue ... (more)

31
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no
votes
3
answers
Last activity 2017-04-21 14:19:53 +0200 by run_ar

how to read values for characterstic.

I am not able to read value from characteristics. Always getting isNotify=NO.

39
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no
votes
1
answer
Last activity 2017-04-20 11:03:18 +0200 by run_ar

NRF_BLE_GATT_MAX_MTU_SIZE > 23 and backwards compatibility

Hello,

I didn't find much information about how different settings for the MTU size behaves with older versions of BLE devices. I'm using the softdevice s132 4.0.2.

/*  Configure the maximum ATT MTU. */
memset(&ble_cfg, 0x00, sizeof ...
(more)

68
views
no
votes
1
answer
Last activity 2017-04-19 19:58:22 +0200 by Petter Myhre flag of Norway

Configuring the Link Layer for DLE with s132 v4.0.2?

With s132 v3, in addition to configuring the GATT to receive larger packets like so:

ble_enable_params.gatt_enable_params.att_mtu = 247;
err_code = softdevice_enable(&ble_enable_params);

you also had to configure the link layer:

ble_opts.gap_opt.ext_len.rxtx_max_pdu_payload_size = 251;
err_code = sd_ble_opt_set(BLE_GAP_OPT_EXT_LEN, &ble_opts);

I ... (more)

626
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6
votes
3
answers
Last activity 2017-04-15 19:32:35 +0200 by Khalid

How is the RTS-pin controlled in UART with flowcontrol

I am using a nrf52832 to communicate via UART to a GSM module (AT commands).

I have setup the device with a baud rate of 9600 and using HW flowcontrol. The nrf52 is doing other stuff at the same time ... (more)

89
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5
votes
3
answers
Last activity 2017-04-12 21:46:23 +0200 by jcormier

S132: Is it possible to send an empty notification

My previous product uses an empty notification to indicate that a bulk transfer is finished. I attempted to send an empty notification but got error code 0x10 (NRF_ERROR_INVALID_FLAGS).

Is there a way to send an empty notification?

ble_gatts_hvx_params_t hvx_param =
{
    .type ...
(more)

32
views
1
vote
1
answer
Last activity 2017-04-09 12:23:45 +0200 by RK flag of Singapore

gpiote with FreeRTOS

Hi,

I migrate my code to FreeRTOS environment.

I use SDK12.2.0 ble_hrs_freertos code example as a startup project.

My question is how i need to init gpite?I receive error ,8

  err_code = nrf_drv_gpiote_init(); //!!! err_code  = 8
  APP_ERROR_CHECK(err_code);

And ... (more)

63
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no
votes
1
answer
Last activity 2017-04-09 01:07:06 +0200 by endnode

Bricked Sparkfun nRF52832?

I have the nRF52DK board and I am using that to reprogram the Sparkfun breakout. However, initially, I was using the Sparkfun Beefy UART device to flash the nRF52832 to begin my SPI project using BLE.

What happened: Firstly, I ... (more)

39
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1
vote
1
answer
Last activity 2017-04-06 16:18:35 +0200 by Petter Myhre flag of Norway

How do I transfer a large file w/L2CAP oriented connection and credit based flow control?

I'm looking for a way to transfer a large file at high transfer rate with an L2CAP oriented connection with credit based flow control, as briefly referenced in this post.

https://devzone.nordicsemi.com/questi...

If you want more ...

(more)

38
views
4
votes
1
answer
Last activity 2017-04-05 20:31:06 +0200 by endnode

nrf52 advertising multiple services

Hi,

Similar questions have already been posted but they don't seem to fit to my problem...

Basically I want to advertise 3 primary services, starting from the 'experimental_ble_app_blinky' example: the already provided lbs service and two new ones. For ... (more)

71
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no
votes
no
answers
Last activity 2017-04-04 01:50:45 +0200 by roger.k

being discovered service using milti-link peripheral [closed]

Hi. i'm using nRF52832, SDK13, S132v4 as multi-link peripheral.

As I know, SDK13 supports multi-link peripheral refering to example "experimental_ble_app_multiperipheral".

But as I tested, when 1 central is connected, other centrals can make connections but can't discover services ... (more)

37
views
no
votes
1
answer
Last activity 2017-03-29 15:01:46 +0200 by Kristin flag of Norway

ibeacon continuous scanning and connectable service

Hi,

I adapted the ble_app_multilink example to continuously scanning for ibeacons and collecting rssi data.

Data are then sent via UART to a microcontroller which provides Bluetooth connectivity in order to read data on an iOS device.

I am using ... (more)

76
views
2
votes
2
answers
Last activity 2017-03-24 12:38:00 +0200 by Hung Bui

Can I update the SoftDevice without touching the application?

I'm working on an OTA firmware update process, using my own bootloader and application. To understand the process' limitations, I need to know to what extent one can update the SoftDevice without invalidating the application.

The chart on the ... (more)

31
views
1
vote
2
answers
Last activity 2017-03-23 15:24:49 +0200 by Maxim flag of Russian Federation

Deny connection on wrong application

Hi,

I'm working on a Custom Android app which connect to my NRF52 without any security.

This App is based on the UART demo App for Android, but I want that only my App will be able to connect ... (more)

57
views
no
votes
1
answer
Last activity 2017-03-23 08:33:57 +0200 by Kristin flag of Norway

Softdevice halts at location 0x000008C4

Hi There,

We have an issue where our project crashes, but the app_error_fault_handler() callback is not being called to help identify the cause of the issue. We are using the following version of the Softdevice: s132_nrf52_3.0.0_softdevice.hex

Without ... (more)

86
views
no
votes
1
answer
Last activity 2017-03-22 12:42:00 +0200 by Hung Bui

freertos not working in nRF5_SDK_13.0.0_04a0bfd

Just opened the new sdk and tried it out. Keil stated I needed to update packs so I did

I have 2 DK boards both are versions V1.1.0 dated 2016 32

Using nRFGo I erase all and load ... (more)

90
views
1
vote
3
answers
Last activity 2017-03-21 14:42:40 +0200 by Hung Bui

Frequency hopping with S132 v3

Hello! I'd like to know if S132 v3 implements the frequency hopping scheme defined by BLE.

I've read some documentation on Gazell, but from what I understood, that is a completely different protocol, not a superset of BLE ... (more)

133
views
no
votes
3
answers
Last activity 2017-03-21 12:54:24 +0200 by AmiguelS

More than 1 packet per CI with S132 V3.0.0

Hello! I am using a nRF52832 device, along with SDK 12.1.0 and S132 v3.0.0. Data is being sent data through BLE and received on an Android phone.

After some tests I noticed that I was not ... (more)

31
views
no
votes
1
answer
Last activity 2017-03-20 10:41:34 +0200 by Sigurd flag of Norway

softdevice 132 used heap?

I want at s132 use RT-Thread RTOS,but I see arm_startup_nrf52.s file defined Stack_Size and Heap_Size 8K, can define Heap_Size = 0? reduce the Stack_Size (such as 4K)? so,RT-Thread RTOS can use larger memory.

93
views
1
vote
1
answer
Last activity 2017-03-20 09:44:11 +0200 by Wojtek flag of Poland

nrf52 PPI+EasyDMA using timer and SPI

Hi,

I am using nrf52832 for my application. The application share same SPI module for two sensors(with sensors are selected using two chip select pins). Is it possible to implement PPI channel between a timer and this SPI module ... (more)

43
views
1
vote
1
answer
Last activity 2017-03-19 22:11:11 +0200 by Turbo J

ULINKpro Keil -> Cannot access memory

Hi. I have an NRF52DK Board. With the built in JLINK Debugger it works fine. Now i bougt an KEIL ULINKpro Debugger. Is connected with the 10 Pin cable. And i cannot flash the Firmware. It gives this Error.

image description

image description

This ... (more)

33
views
-1
votes
no
answers
Last activity 2017-03-13 16:45:26 +0200 by juge90

I find the bluetooth protocol stack to hang out?

Sometimes,I find the bluetooth protocol stack to hang out.At that time, bluetooth and flash related operation is invalid.

SDk12.0.0 S132 freertos

54
views
1
vote
1
answer
Last activity 2017-03-10 11:48:09 +0200 by endnode

BLE Central Server multiple Peripheral Clients

I need to have a Central device physically connected (via UART) to a sensor. Data is collected from the sensor and sent to a number of Peripheral devices which use the data to perform a task.

So far I have ... (more)

541
views
2
votes
1
answer
Last activity 2017-03-03 15:11:54 +0200 by Hung Bui

NRF52 ble_db_discovery failed to initialize correctly when repeats the service discovery

Hi

We are using NRF52 and SDK 11 and S132.

The nrf52 acts as a central and selectively connects to the closest phones (ios) that are acting as a pheripheral. For this purpose we have 4 characteristics (TX, RX, RSSI ... (more)

63
views
1
vote
1
answer
Last activity 2017-02-28 10:15:20 +0200 by Jørgen Holmefjord flag of Norway

What are nRF52 advertisements exactly good for and what UUID do I have to put?

Hi!

So I managed to create my custom service with one characteristic (a struct with several attribs). I can see it in my app and everything's awesome. Yay.

But in some tutorial and in the sample app I altered ... (more)

279
views
2
votes
2
answers
Last activity 2017-02-23 19:03:23 +0200 by Alessandro

How to send longer than 256 bytes in nRF52 spi list mode with nRF5_SDK_11?

Hi: Recently, I want to use nRF52 to read or write some data from a flash chip(w25q128bv) by using spi, I've read Manufactures ID correctly, also, I have wrote a register of the flash chip and read back ... (more)

59
views
no
votes
1
answer
Last activity 2017-02-22 13:19:58 +0200 by Bjørn Spockeli flag of Norway

Version numbers for Secure DFU

Why do the version numbers have to be as follows for a merged hex file to be able to exit the dfu mode when flashed externally as a combined hex file (SD +BL + BL settings + App)?

nrfutil settings generate --family ... (more)

59
views
4
votes
1
answer
Last activity 2017-02-21 09:11:44 +0200 by Tostikoning

Reset on SVCALL BLE enable

Hi all,

I am trying to get the ble template of SDK12.2 working in eclipse using a managed makefile. The softdevice I use is s132 v3.0.0. The board is an evaluation kit from Taiyo Yuden (EKSHCNZXZ) which ... (more)

100
views
no
votes
no
answers
Last activity 2017-02-21 08:09:37 +0200 by jasonbu

[solved] DFU swap region remains contents [closed]

when using secureDFU with sdk12.2, only changed the mac address. my application is more than 60KByte, when i test the firmware for two files, one is 62K and an other is 64K. it got a trouble, when data send ... (more)

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